def parseBlockHeader(blkHdrBinary):
binunpack = BinaryUnpacker(blkHdrBinary)
return BlockHeader(binunpack.get(UINT32),
binunpack.get(BINARY_CHUNK, 32),
binunpack.get(BINARY_CHUNK, 32),
binunpack.get(UINT32),
binunpack.get(UINT32),
binunpack.get(UINT32))
def getBlockHeight(txBinary): binunpack = BinaryUnpacker(txBinary) binunpack.advance(VERSION_LENGTH) txInCount = binunpack.get(VAR_INT) binunpack.advance(TX_OUT_HASH_LENGTH + TX_OUT_INDEX_LENGTH) sigScriptLength = binunpack.get(VAR_INT) binunpack.advance(1) height = binary_to_int(binunpack.get(BINARY_CHUNK, 3)) return height
def getNextBlock(f):
fileOffset = f.tell()
f.seek(MAGIC_NUMBER_LENGTH, 1)
blkSize = binary_to_int(f.read(BLOCK_SIZE_LENGTH), LITTLEENDIAN)
result = None
if blkSize > 0:
binunpack = BinaryUnpacker(f.read(blkSize))
blkHdrBinary = binunpack.get(BINARY_CHUNK, HEADER_LENGTH)
txCount = binunpack.get(VAR_INT)
txBinary = binunpack.get(BINARY_CHUNK, binunpack.getRemainingSize())
blockHeight = getBlockHeight(txBinary)
result = [sha256(sha256(blkHdrBinary)), blockHeight, fileOffset]
else:
f.seek(0,2)
return result
def getNextBlock(f):
fileOffset = f.tell()
f.seek(MAGIC_NUMBER_LENGTH, 1)
blkSize = binary_to_int(f.read(BLOCK_SIZE_LENGTH), LITTLEENDIAN)
result = None
if blkSize > 0:
binunpack = BinaryUnpacker(f.read(blkSize))
blkHdrBinary = binunpack.get(BINARY_CHUNK, HEADER_LENGTH)
txCount = binunpack.get(VAR_INT)
txBinary = binunpack.get(BINARY_CHUNK, binunpack.getRemainingSize())
blockHeight = getBlockHeight(txBinary)
result = [sha256(sha256(blkHdrBinary)), blockHeight, fileOffset]
else:
f.seek(0, 2)
return result
def getBlockHeight(txBinary):
binunpack = BinaryUnpacker(txBinary)
binunpack.advance(VERSION_LENGTH)
txInCount = binunpack.get(VAR_INT)
binunpack.advance(TX_OUT_HASH_LENGTH + TX_OUT_INDEX_LENGTH)
sigScriptLength = binunpack.get(VAR_INT)
binunpack.advance(1)
height = binary_to_int(binunpack.get(BINARY_CHUNK, 3))
return height
def parseBlockHeader(blkHdrBinary):
binunpack = BinaryUnpacker(blkHdrBinary)
return BlockHeader(binunpack.get(UINT32), binunpack.get(BINARY_CHUNK, 32),
binunpack.get(BINARY_CHUNK, 32), binunpack.get(UINT32),
binunpack.get(UINT32), binunpack.get(UINT32))
